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  <title>Check whether the inner iterator's current element has children</title>
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  <div id="layout-content"><div id="recursivecallbackfilteriterator.haschildren" class="refentry">
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  <h1 class="refname">RecursiveCallbackFilterIterator::hasChildren</h1>
  <p class="verinfo">(PHP 5 &gt;= 5.4.0, PHP 7, PHP 8)</p><p class="refpurpose"><span class="refname">RecursiveCallbackFilterIterator::hasChildren</span> &mdash; <span class="dc-title">Check whether the inner iterator&#039;s current element has children</span></p>

 </div>

 <div class="refsect1 description" id="refsect1-recursivecallbackfilteriterator.haschildren-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="modifier">public</span> <span class="methodname"><strong>RecursiveCallbackFilterIterator::hasChildren</strong></span>(): <span class="type">bool</span></div>

  <p class="para rdfs-comment">
   Returns <strong><code>true</code></strong> if the current element has children, <strong><code>false</code></strong> otherwise.
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-recursivecallbackfilteriterator.haschildren-parameters">
  <h3 class="title">参数</h3>
  <p class="para">此函数没有参数。</p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-recursivecallbackfilteriterator.haschildren-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   Returns <strong><code>true</code></strong> if the current element has children, <strong><code>false</code></strong> otherwise.
  </p>
 </div>


 <div class="refsect1 examples" id="refsect1-recursivecallbackfilteriterator.haschildren-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="recursivecallbackfilteriterator.haschildren.examples.basic">
    <p><strong>示例 #1 <span class="methodname"><strong>RecursiveCallbackFilterIterator::hasChildren()</strong></span> basic usage</strong></p>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br /><br />$dir&nbsp;</span><span style="color: #007700">=&nbsp;new&nbsp;</span><span style="color: #0000BB">RecursiveDirectoryIterator</span><span style="color: #007700">(</span><span style="color: #0000BB">__DIR__</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">//&nbsp;Recursively&nbsp;iterate&nbsp;over&nbsp;XML&nbsp;files<br /></span><span style="color: #0000BB">$files&nbsp;</span><span style="color: #007700">=&nbsp;new&nbsp;</span><span style="color: #0000BB">RecursiveCallbackFilterIterator</span><span style="color: #007700">(</span><span style="color: #0000BB">$dir</span><span style="color: #007700">,&nbsp;function&nbsp;(</span><span style="color: #0000BB">$current</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$key</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$iterator</span><span style="color: #007700">)&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #FF8000">//&nbsp;Allow&nbsp;recursion&nbsp;into&nbsp;directories<br />&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #007700">if&nbsp;(</span><span style="color: #0000BB">$iterator</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">hasChildren</span><span style="color: #007700">())&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return&nbsp;</span><span style="color: #0000BB">TRUE</span><span style="color: #007700">;<br />&nbsp;&nbsp;&nbsp;&nbsp;}<br />&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #FF8000">//&nbsp;Check&nbsp;for&nbsp;XML&nbsp;file<br />&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #007700">if&nbsp;(!</span><span style="color: #0000BB">strcasecmp</span><span style="color: #007700">(</span><span style="color: #0000BB">$current</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">getExtension</span><span style="color: #007700">(),&nbsp;</span><span style="color: #DD0000">'xml'</span><span style="color: #007700">))&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return&nbsp;</span><span style="color: #0000BB">TRUE</span><span style="color: #007700">;<br />&nbsp;&nbsp;&nbsp;&nbsp;}<br />&nbsp;&nbsp;&nbsp;&nbsp;return&nbsp;</span><span style="color: #0000BB">FALSE</span><span style="color: #007700">;<br />});<br /><br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
    </div>

   </div>
  </p>
 </div>


 <div class="refsect1 seealso" id="refsect1-recursivecallbackfilteriterator.haschildren-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><a href="class.recursivecallbackfilteriterator.html#recursivecallbackfilteriterator.examples" class="link">RecursiveCallbackFilterIterator Examples</a></li>
    <li class="member"><span class="methodname"><a href="recursivecallbackfilteriterator.construct.html" class="methodname" rel="rdfs-seeAlso">RecursiveCallbackFilterIterator::__construct()</a> - Create a RecursiveCallbackFilterIterator from a RecursiveIterator</span></li>
    <li class="member"><span class="methodname"><a href="recursivecallbackfilteriterator.getchildren.html" class="methodname" rel="rdfs-seeAlso">RecursiveCallbackFilteriterator::getChildren()</a> - Return the inner iterator's children contained in a RecursiveCallbackFilterIterator</span></li>
   </ul>
  </p>
 </div>


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